This is entry number 8 in Randy Wayne White's Doc Ford series. As usual, it's excellent. It begins with Doc and his friend Tomlinson taking a working vacation at a rich-person resort. But in a very few pages, Doc has met a Bahamian woman who claims to be his sister and has gotten grazed by a bullet while foiling a kidnapping attempt by Columbian drug gangsters.
Also, Tomlinson has wiener problems.
Doc spends the rest of the book attempting to recover from these complications. As always, he's more than a little irritated at being called away from his actual marine biologist job.
Randy Wayne White is a very good writer, although at times he seems to be trying to imitate John D. MacDonald a little too much. (On the other hand, who better to imitate?)